1 /* 2 * Copyright (c) 2000-2005 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 #ifndef __XFS_MOUNT_H__ 19 #define __XFS_MOUNT_H__ 20 21 struct xlog; 22 struct xfs_inode; 23 struct xfs_mru_cache; 24 struct xfs_nameops; 25 struct xfs_ail; 26 struct xfs_quotainfo; 27 struct xfs_dir_ops; 28 struct xfs_da_geometry; 29 30 /* dynamic preallocation free space thresholds, 5% down to 1% */ 31 enum { 32 XFS_LOWSP_1_PCNT = 0, 33 XFS_LOWSP_2_PCNT, 34 XFS_LOWSP_3_PCNT, 35 XFS_LOWSP_4_PCNT, 36 XFS_LOWSP_5_PCNT, 37 XFS_LOWSP_MAX, 38 }; 39 40 /* 41 * Error Configuration 42 * 43 * Error classes define the subsystem the configuration belongs to. 44 * Error numbers define the errors that are configurable. 45 */ 46 enum { 47 XFS_ERR_METADATA, 48 XFS_ERR_CLASS_MAX, 49 }; 50 enum { 51 XFS_ERR_DEFAULT, 52 XFS_ERR_EIO, 53 XFS_ERR_ENOSPC, 54 XFS_ERR_ENODEV, 55 XFS_ERR_ERRNO_MAX, 56 }; 57 58 #define XFS_ERR_RETRY_FOREVER -1 59 60 struct xfs_error_cfg { 61 struct xfs_kobj kobj; 62 int max_retries; 63 unsigned long retry_timeout; /* in jiffies, 0 = no timeout */ 64 }; 65 66 typedef struct xfs_mount { 67 struct super_block *m_super; 68 xfs_tid_t m_tid; /* next unused tid for fs */ 69 struct xfs_ail *m_ail; /* fs active log item list */ 70 71 struct xfs_sb m_sb; /* copy of fs superblock */ 72 spinlock_t m_sb_lock; /* sb counter lock */ 73 struct percpu_counter m_icount; /* allocated inodes counter */ 74 struct percpu_counter m_ifree; /* free inodes counter */ 75 struct percpu_counter m_fdblocks; /* free block counter */ 76 77 struct xfs_buf *m_sb_bp; /* buffer for superblock */ 78 char *m_fsname; /* filesystem name */ 79 int m_fsname_len; /* strlen of fs name */ 80 char *m_rtname; /* realtime device name */ 81 char *m_logname; /* external log device name */ 82 int m_bsize; /* fs logical block size */ 83 xfs_agnumber_t m_agfrotor; /* last ag where space found */ 84 xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */ 85 spinlock_t m_agirotor_lock;/* .. and lock protecting it */ 86 xfs_agnumber_t m_maxagi; /* highest inode alloc group */ 87 uint m_readio_log; /* min read size log bytes */ 88 uint m_readio_blocks; /* min read size blocks */ 89 uint m_writeio_log; /* min write size log bytes */ 90 uint m_writeio_blocks; /* min write size blocks */ 91 struct xfs_da_geometry *m_dir_geo; /* directory block geometry */ 92 struct xfs_da_geometry *m_attr_geo; /* attribute block geometry */ 93 struct xlog *m_log; /* log specific stuff */ 94 int m_logbufs; /* number of log buffers */ 95 int m_logbsize; /* size of each log buffer */ 96 uint m_rsumlevels; /* rt summary levels */ 97 uint m_rsumsize; /* size of rt summary, bytes */ 98 struct xfs_inode *m_rbmip; /* pointer to bitmap inode */ 99 struct xfs_inode *m_rsumip; /* pointer to summary inode */ 100 struct xfs_inode *m_rootip; /* pointer to root directory */ 101 struct xfs_quotainfo *m_quotainfo; /* disk quota information */ 102 xfs_buftarg_t *m_ddev_targp; /* saves taking the address */ 103 xfs_buftarg_t *m_logdev_targp;/* ptr to log device */ 104 xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */ 105 __uint8_t m_blkbit_log; /* blocklog + NBBY */ 106 __uint8_t m_blkbb_log; /* blocklog - BBSHIFT */ 107 __uint8_t m_agno_log; /* log #ag's */ 108 __uint8_t m_agino_log; /* #bits for agino in inum */ 109 uint m_inode_cluster_size;/* min inode buf size */ 110 uint m_blockmask; /* sb_blocksize-1 */ 111 uint m_blockwsize; /* sb_blocksize in words */ 112 uint m_blockwmask; /* blockwsize-1 */ 113 uint m_alloc_mxr[2]; /* max alloc btree records */ 114 uint m_alloc_mnr[2]; /* min alloc btree records */ 115 uint m_bmap_dmxr[2]; /* max bmap btree records */ 116 uint m_bmap_dmnr[2]; /* min bmap btree records */ 117 uint m_inobt_mxr[2]; /* max inobt btree records */ 118 uint m_inobt_mnr[2]; /* min inobt btree records */ 119 uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */ 120 uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */ 121 uint m_in_maxlevels; /* max inobt btree levels. */ 122 struct radix_tree_root m_perag_tree; /* per-ag accounting info */ 123 spinlock_t m_perag_lock; /* lock for m_perag_tree */ 124 struct mutex m_growlock; /* growfs mutex */ 125 int m_fixedfsid[2]; /* unchanged for life of FS */ 126 uint m_dmevmask; /* DMI events for this FS */ 127 __uint64_t m_flags; /* global mount flags */ 128 int m_ialloc_inos; /* inodes in inode allocation */ 129 int m_ialloc_blks; /* blocks in inode allocation */ 130 int m_ialloc_min_blks;/* min blocks in sparse inode 131 * allocation */ 132 int m_inoalign_mask;/* mask sb_inoalignmt if used */ 133 uint m_qflags; /* quota status flags */ 134 struct xfs_trans_resv m_resv; /* precomputed res values */ 135 __uint64_t m_maxicount; /* maximum inode count */ 136 __uint64_t m_resblks; /* total reserved blocks */ 137 __uint64_t m_resblks_avail;/* available reserved blocks */ 138 __uint64_t m_resblks_save; /* reserved blks @ remount,ro */ 139 int m_dalign; /* stripe unit */ 140 int m_swidth; /* stripe width */ 141 int m_sinoalign; /* stripe unit inode alignment */ 142 __uint8_t m_sectbb_log; /* sectlog - BBSHIFT */ 143 const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */ 144 const struct xfs_dir_ops *m_dir_inode_ops; /* vector of dir inode ops */ 145 const struct xfs_dir_ops *m_nondir_inode_ops; /* !dir inode ops */ 146 uint m_chsize; /* size of next field */ 147 atomic_t m_active_trans; /* number trans frozen */ 148 struct xfs_mru_cache *m_filestream; /* per-mount filestream data */ 149 struct delayed_work m_reclaim_work; /* background inode reclaim */ 150 struct delayed_work m_eofblocks_work; /* background eof blocks 151 trimming */ 152 bool m_update_sb; /* sb needs update in mount */ 153 int64_t m_low_space[XFS_LOWSP_MAX]; 154 /* low free space thresholds */ 155 struct xfs_kobj m_kobj; 156 struct xfs_kobj m_error_kobj; 157 struct xfs_kobj m_error_meta_kobj; 158 struct xfs_error_cfg m_error_cfg[XFS_ERR_CLASS_MAX][XFS_ERR_ERRNO_MAX]; 159 struct xstats m_stats; /* per-fs stats */ 160 161 struct workqueue_struct *m_buf_workqueue; 162 struct workqueue_struct *m_data_workqueue; 163 struct workqueue_struct *m_unwritten_workqueue; 164 struct workqueue_struct *m_cil_workqueue; 165 struct workqueue_struct *m_reclaim_workqueue; 166 struct workqueue_struct *m_log_workqueue; 167 struct workqueue_struct *m_eofblocks_workqueue; 168 169 /* 170 * Generation of the filesysyem layout. This is incremented by each 171 * growfs, and used by the pNFS server to ensure the client updates 172 * its view of the block device once it gets a layout that might 173 * reference the newly added blocks. Does not need to be persistent 174 * as long as we only allow file system size increments, but if we 175 * ever support shrinks it would have to be persisted in addition 176 * to various other kinds of pain inflicted on the pNFS server. 177 */ 178 __uint32_t m_generation; 179 180 bool m_fail_unmount; 181 #ifdef DEBUG 182 /* 183 * DEBUG mode instrumentation to test and/or trigger delayed allocation 184 * block killing in the event of failed writes. When enabled, all 185 * buffered writes are forced to fail. All delalloc blocks in the range 186 * of the write (including pre-existing delalloc blocks!) are tossed as 187 * part of the write failure error handling sequence. 188 */ 189 bool m_fail_writes; 190 #endif 191 } xfs_mount_t; 192 193 /* 194 * Flags for m_flags. 195 */ 196 #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops 197 must be synchronous except 198 for space allocations */ 199 #define XFS_MOUNT_UNMOUNTING (1ULL << 1) /* filesystem is unmounting */ 200 #define XFS_MOUNT_WAS_CLEAN (1ULL << 3) 201 #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem 202 operations, typically for 203 disk errors in metadata */ 204 #define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */ 205 #define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment 206 allocations */ 207 #define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */ 208 #define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */ 209 #define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */ 210 #define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */ 211 #define XFS_MOUNT_SMALL_INUMS (1ULL << 14) /* user wants 32bit inodes */ 212 #define XFS_MOUNT_32BITINODES (1ULL << 15) /* inode32 allocator active */ 213 #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */ 214 #define XFS_MOUNT_BARRIER (1ULL << 17) 215 #define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/ 216 #define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width 217 * allocation */ 218 #define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */ 219 #define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */ 220 #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred 221 * I/O size in stat() */ 222 #define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams 223 allocator */ 224 #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */ 225 226 #define XFS_MOUNT_DAX (1ULL << 62) /* TEST ONLY! */ 227 228 229 /* 230 * Default minimum read and write sizes. 231 */ 232 #define XFS_READIO_LOG_LARGE 16 233 #define XFS_WRITEIO_LOG_LARGE 16 234 235 /* 236 * Max and min values for mount-option defined I/O 237 * preallocation sizes. 238 */ 239 #define XFS_MAX_IO_LOG 30 /* 1G */ 240 #define XFS_MIN_IO_LOG PAGE_SHIFT 241 242 /* 243 * Synchronous read and write sizes. This should be 244 * better for NFSv2 wsync filesystems. 245 */ 246 #define XFS_WSYNC_READIO_LOG 15 /* 32k */ 247 #define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */ 248 249 /* 250 * Allow large block sizes to be reported to userspace programs if the 251 * "largeio" mount option is used. 252 * 253 * If compatibility mode is specified, simply return the basic unit of caching 254 * so that we don't get inefficient read/modify/write I/O from user apps. 255 * Otherwise.... 256 * 257 * If the underlying volume is a stripe, then return the stripe width in bytes 258 * as the recommended I/O size. It is not a stripe and we've set a default 259 * buffered I/O size, return that, otherwise return the compat default. 260 */ 261 static inline unsigned long 262 xfs_preferred_iosize(xfs_mount_t *mp) 263 { 264 if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE) 265 return PAGE_SIZE; 266 return (mp->m_swidth ? 267 (mp->m_swidth << mp->m_sb.sb_blocklog) : 268 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ? 269 (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) : 270 PAGE_SIZE)); 271 } 272 273 #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \ 274 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN) 275 #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN) 276 void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname, 277 int lnnum); 278 #define xfs_force_shutdown(m,f) \ 279 xfs_do_force_shutdown(m, f, __FILE__, __LINE__) 280 281 #define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */ 282 #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */ 283 #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */ 284 #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */ 285 #define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */ 286 #define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */ 287 288 /* 289 * Flags for xfs_mountfs 290 */ 291 #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */ 292 293 static inline xfs_agnumber_t 294 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d) 295 { 296 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); 297 do_div(ld, mp->m_sb.sb_agblocks); 298 return (xfs_agnumber_t) ld; 299 } 300 301 static inline xfs_agblock_t 302 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d) 303 { 304 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); 305 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks); 306 } 307 308 #ifdef DEBUG 309 static inline bool 310 xfs_mp_fail_writes(struct xfs_mount *mp) 311 { 312 return mp->m_fail_writes; 313 } 314 #else 315 static inline bool 316 xfs_mp_fail_writes(struct xfs_mount *mp) 317 { 318 return 0; 319 } 320 #endif 321 322 /* 323 * Per-ag incore structure, copies of information in agf and agi, to improve the 324 * performance of allocation group selection. 325 */ 326 typedef struct xfs_perag { 327 struct xfs_mount *pag_mount; /* owner filesystem */ 328 xfs_agnumber_t pag_agno; /* AG this structure belongs to */ 329 atomic_t pag_ref; /* perag reference count */ 330 char pagf_init; /* this agf's entry is initialized */ 331 char pagi_init; /* this agi's entry is initialized */ 332 char pagf_metadata; /* the agf is preferred to be metadata */ 333 char pagi_inodeok; /* The agi is ok for inodes */ 334 __uint8_t pagf_levels[XFS_BTNUM_AGF]; 335 /* # of levels in bno & cnt btree */ 336 __uint32_t pagf_flcount; /* count of blocks in freelist */ 337 xfs_extlen_t pagf_freeblks; /* total free blocks */ 338 xfs_extlen_t pagf_longest; /* longest free space */ 339 __uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */ 340 xfs_agino_t pagi_freecount; /* number of free inodes */ 341 xfs_agino_t pagi_count; /* number of allocated inodes */ 342 343 /* 344 * Inode allocation search lookup optimisation. 345 * If the pagino matches, the search for new inodes 346 * doesn't need to search the near ones again straight away 347 */ 348 xfs_agino_t pagl_pagino; 349 xfs_agino_t pagl_leftrec; 350 xfs_agino_t pagl_rightrec; 351 spinlock_t pagb_lock; /* lock for pagb_tree */ 352 struct rb_root pagb_tree; /* ordered tree of busy extents */ 353 354 atomic_t pagf_fstrms; /* # of filestreams active in this AG */ 355 356 spinlock_t pag_ici_lock; /* incore inode cache lock */ 357 struct radix_tree_root pag_ici_root; /* incore inode cache root */ 358 int pag_ici_reclaimable; /* reclaimable inodes */ 359 struct mutex pag_ici_reclaim_lock; /* serialisation point */ 360 unsigned long pag_ici_reclaim_cursor; /* reclaim restart point */ 361 362 /* buffer cache index */ 363 spinlock_t pag_buf_lock; /* lock for pag_buf_tree */ 364 struct rb_root pag_buf_tree; /* ordered tree of active buffers */ 365 366 /* for rcu-safe freeing */ 367 struct rcu_head rcu_head; 368 int pagb_count; /* pagb slots in use */ 369 } xfs_perag_t; 370 371 extern void xfs_uuid_table_free(void); 372 extern int xfs_log_sbcount(xfs_mount_t *); 373 extern __uint64_t xfs_default_resblks(xfs_mount_t *mp); 374 extern int xfs_mountfs(xfs_mount_t *mp); 375 extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount, 376 xfs_agnumber_t *maxagi); 377 extern void xfs_unmountfs(xfs_mount_t *); 378 379 extern int xfs_mod_icount(struct xfs_mount *mp, int64_t delta); 380 extern int xfs_mod_ifree(struct xfs_mount *mp, int64_t delta); 381 extern int xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta, 382 bool reserved); 383 extern int xfs_mod_frextents(struct xfs_mount *mp, int64_t delta); 384 385 extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int); 386 extern int xfs_readsb(xfs_mount_t *, int); 387 extern void xfs_freesb(xfs_mount_t *); 388 extern bool xfs_fs_writable(struct xfs_mount *mp, int level); 389 extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t); 390 391 extern int xfs_dev_is_read_only(struct xfs_mount *, char *); 392 393 extern void xfs_set_low_space_thresholds(struct xfs_mount *); 394 395 int xfs_zero_extent(struct xfs_inode *ip, xfs_fsblock_t start_fsb, 396 xfs_off_t count_fsb); 397 398 struct xfs_error_cfg * xfs_error_get_cfg(struct xfs_mount *mp, 399 int error_class, int error); 400 401 #endif /* __XFS_MOUNT_H__ */ 402